Background technology
At EPS (Evolved Packet System, the grouping system of evolution) in, ISR (Idle State Signalling Reduction, idle state signaling is optimized) be Idle state signaling minimizing technology, for reducing the signaling traffic load between Idle state (ILDE state) UE (User Equipment, user terminal) and network.
SGSN (Serving GPRS Support Node, service GPRS service node) be UTRAN (Universal Terrestrial Radio Access Network, universal terrestrial access network) network entity in, MME (Mobility Management Entity, Mobility Management Entity) be the network entity in E-UTRAN (Evolved Universal Terrestrial Radio Access Network, evolved universal terrestrial radio access network).
The MME and the SGSN in UTRAN that as UE, are registered in E-UTRAN go up and activate after ISR simultaneously, TAI (the Tracking Area ID that the UE of Idle state registers at it in E-UTRAN, tracking area identification) RA (RoutingArea that register it between the tracking area TA in LIST or in UTRAN, while moving Routing Area), do not need to carry out Signalling exchange with network side.
The activation of ISR is by network controls, when Idle state UE initiates TAU (Tracking Area Update at E-UTRAN or UTRAN, tracing section updating) or RAU (Routing Area Update, routing region updating) during process, MME or SGSN indicate UE whether to activate ISR by accept message or RAU at TAU in accepting message, and UE indicates to activate or deexcitation ISR according to this.The initial value of TIN, after ATTACH success, is arranged by UE.When UE initially adheres to successfully at E-UTRAN, no matter what its original value is, is all set to GUTI.When UE initially adheres to successfully at GERAN/UTRAN, no matter what its original value is, is all set to P-TMSI.When the TAU receiving as UE accepts message or RAU and accepts message and be designated as ISR deexcitation, the TIN of this locality storage (Temporary Identity used in Next update, the temporary mark that next update is used) need to be set gradually to no matter what its original value is for GUTI or P-TMSI.When activating by TAU receipt message indication ISR, UE, according to the value of TIN, determines the setting of TIN.If TIN value is P-TMSI or RAT-related TMSI, TIN is set to RAT-related TMSI, if TIN value is GUTI, TIN value is set to GUTI.When activating by RAU receipt message indication ISR, UE, according to the value of TIN, determines the setting of TIN.If TIN value is GUTI or RAT-related TMSI, TIN is set to RAT-related TMSI, if TIN value is P-TMSI, TIN value is set to P-TMSI.Note, the value of TIN only plays differentiation effect herein.
In this article, " area update " general reference " tracing section updating " or " routing region updating ".So that UE is existing, by UTRAN, be attached to network below, then entering E-UTRAN initiation TAU process is that example describes.As shown in Figure 1, this TAU process comprises:
UE determines when the RA from UTRAN enters the TA in E-UTRAN, determines and meets TAU trigger condition, triggers and starts TAU (step S101); UE is to the request of MME initiating updating of tracking area (step S102~step S103); Because UE has registration at old S4SGSN (SGSN's is a kind of, supports ISR, and SGSN herein all refers to S4-SGSN), new MME asks for the contextual information (step S104, step S105, step S107) of UE to old SGSN; Then MME notification service GW/PDN GW (Packet Data Network Gateway, packet data gateway) revises the beared information (step S109~step S113) of UE; MME sends and upgrades position requests to HSS, and notice HSS cancels the positional information (step S114~step S116) of UE in old SGSN; Old SGSN discharges Iu mouth and connects (step S117, step S118); HSS returns and upgrades position response message (step S119) to MME; MME XiangUE returning tracking district upgrades and accepts message, completes tracing section updating (step S120~step S121).In the process of TAU, MME may re-start authentication (step S106) to UE.
In existing standard (TS23.060 and TS23.401), to activating relevant content to ISR in above-mentioned TAU process, made following regulation:
In step S105, when SGSN sends context response information to MME, indication ISR activates;
In step S107, SGSN receives the context acknowledgement message that MME sends, and in this message, indicates ISR to activate, and SGSN will safeguard the context of UE.
Below in conjunction with several relevant timers, illustrate which problem afore mentioned rules can cause leaving.
Network side is safeguarded has the movement of UE can reach timer Mobile Reachable timer, Mobile Reachable timer starts when UE enters IDLE state, when UE and network side have been set up NAS signaling and be connected (UE enters connected state), network side stops Mobile Reachable timer;
Network side is safeguarded the implicit expression attachment removal timer Implicit Detach timer there is UE, if Mobile Reachable timer is overtime and UE does not set up NAS signaling with network side and is connected, and network side startup Implicit Detach timer.After Implicit Detach timer is overtime, network side is initiated implicit expression detachment process.When UE and network side have been set up NAS signaling and be connected, network stops Implicit Detach timer.
UE, according to the state of access way and ISR, safeguards and has periodically TAU timer and/or periodically RAU timer.
When ISR deexcitation, UE accesses by UTRAN, needs maintenance period RAU timer.When the periodicity RAU of UE timer expiry, need to initiate periodically RAU process.When ISR deexcitation, UE accesses by E-UTRAN, needs maintenance period TAU timer.When the periodicity TAU of UE timer expiry, need to initiate periodically TAU process.Periodically TAU timer and/or periodically earthquake after UE enters Idle state, set up when NAS signaling is connected and stopped with network at UE.
After ISR activates, UE need to safeguard this two timers simultaneously.When UE is resident in UTRAN, if periodicity TAU timer expiry, UE need to start E-UTRAN deexcitation ISR timer E-UTRAN DEACTIVATE ISR TIMER, and UE, when enter into E-UTRAN next time, need to initiate TAU process immediately.When E-UTRAN DEACTIVATE ISR TIMER is overtime, UE needs local deexcitation ISR.When UE enters EMM-DEREGISTERED state or enters EMM-CONNECTED pattern, stop E-UTRAN DEACTIVATE ISR TIMER.When UE is resident in E-UTRAN, if periodicity RAU timer expiry, UE need to start GERAN/UTRAN deexcitation ISR timer GERAN/UTRAN DEACTIVATE ISR TIMER, and UE, when enter into UTRAN next time, need to initiate RAU process immediately.When GERAN/UTRAN DEACTIVATE ISR TIMER is overtime, UE needs local deexcitation ISR.When UE enters GMM-DEREGISTERED state or enters GMM-CONNECTED pattern, stop GERAN/UTRAN DEACTIVATE ISR TIMER.
At present in standard regulation to move the timer length that can reach timer Mobile Reachable timer (be timing, lower same, in this article, the noun implication such as timer length, timing, timer value is identical) slightly longer than the timing of TAU/RAU TIMER periodically.When ISR activates, the timer value of the Implicit Detach timer at MME place is longer than the timer value of the E-UTRAN DEACTIVATE ISR TIMER of UE, and the timer value of the Implicit Detach timer at SGSN place is longer than the timer value of the GERAN/UTRAN DEACTIVATE ISR TIMER of UE.
UE, when initiating RAU, need to, according to the setting of TIN, comprise different signs in RAU request.After ISR activates (now TIN is set to RAT-related TMSI), the P-TMSI only comprising (Packet Temporary Mobile Station Identity, packet TMSI).When ISR deexcitation, if TIN is set to P-TMSI, the P-TMSI only comprising.If TIN is set to GUTI, UE need to hint obliquely at GUTI (Globally Unique Temporary Identity, global unique temporary identity) for P-TMSI, is included in RAU request message, if UE also has P-TMSI, also should be included in RAU request message.When SGSN receives the request that includes two temporary marks, can also utilize P-TMSI to retrieve the local context that whether has this UE.
Like this, in step S105, if old SGSN is after the Mobile of UE Reachable timer is overtime, before Implicit Detach timer is overtime, while having received the context request message from MME (step S104), SGSN still indicates MME to activate ISR, and MME activates to UE indication ISR.Now, because UE is existing, by UTRAN, adhere to, its TIN is set to P-TMSI, and when TAU accepts message indication ISR activation, UE can be set to RAT-related TMSI by TIN.If now UE gets back to UTRAN from E-UTRAN again, and UE determines that ISR is that state of activation is TIN while being set to RAT-related TMSI, can use this sign of P-TMSI to initiate RAU.Now, the Implicit Detach timer that SGSN safeguards may be overtime, because SGSN is at the overtime rear initiation implicit expression detachment process of Implicit Detach timer, now SGSN place will not have the context of UE, so SGSN cannot retrieve according to P-TMSI the context of UE in network.Now network is by the RAU request of refusal UE, and UE need to initiate attaching process again.Network also can be initiated authentication process again.What the ISR state indication of UE side and the state of network side ISR were network side to the context maintenance situation of UE is inconsistent, and the access procedure generation regular hour that causes UE to pass through UTRAN postpones.
In addition, in step S107, although mention SGSN, receive after the context acknowledgement message from MME, need to safeguard the context of this UE.But standard does not provide the context of UE and how long specifically will safeguard.If SGSN is after the Mobile of UE Reachable timer is overtime, before Implicit Detach timer is overtime, received the context request message from MME, indication MME activates ISR, after implicit expression attachment removal timer expiry, continue to safeguard the contextual words of UE, in SGSN, occur a lot of useless contextual informations, and do not have mechanism to remove these useless information.
In UE side, can solve the problems referred to above by the method for local deexcitation ISR.The basic thought of this method is:
1), in UTRAN, when network indicates UE to activate ISR by RAU, if the periodicity TAU TIMER of UE is overtime, UE does not activate ISR or local deexcitation ISR.After this, if UE enters E-UTRAN, when UE initiates TAU, will comprise two temporary marks of P-TMSI and GUTI.
2), in E-UTRAN, when network indicates UE to activate ISR by TAU, if the periodicity RAU TIMER of UE is overtime, UE does not activate ISR or local deexcitation ISR.After this, if UE enters UTRAN, when UE initiates RAU, will comprise two temporary marks of P-TMSI and GUTI.
Still can there is the context maintenance situation of ISR state indication of above-mentioned UE side and the inconsistent problem of actual maintenance condition in said method, and UE is during from one of them network to another network, due to ISR deexcitation, no matter what situation all can comprise two signs in TAU/RAU request, wasted to a certain extent air interface resource; And network side need to receive that two temporary marks process, increase the signaling consumption of network side and the processing time of TAU/RAU to postpone.
Embodiment
ISR method of operation and the user terminal UE of activation/deactivation ISR optimization method the present invention being proposed below in conjunction with drawings and Examples and network equipment, UE side illustrate in greater detail.
While whether activating ISR alternately in order to overcome existing MME and SGSN, as long as determine that current network node support activates ISR, determine activation ISR, and may cause the inconsistent situation of state of the ISR of network side and UE side.The present invention proposes a kind of activation/deactivation ISR optimization method, as shown in Figure 2, comprising:
Step S201, at UE in area update procedures, when first network entity receives the context request message of second network entity transmission, according to the movement of the described UE of correspondence, can reach the running status of timer and/or implicit expression attachment removal timer, determine and activate or deexcitation ISR;
Preferably, above-mentioned zone renewal process is specially the TAU process of initiating when the RA of UE from UTRAN enters the TA in E-UTRAN, and now, first network entity is SGSN, and second network entity is MME;
Or above-mentioned zone renewal process is specially the RAU process of initiating when the TA of UE from E-UTRAN enters the RA in UTRAN, now, first network entity is MME, and second network entity is SGSN.
Step S202, first network entity will determine that result sends to second network entity.By described second network entity, according to the definite result receiving, determine that indication UE activates or deexcitation ISR.Preferably, second network entity sends to first network entity by the indication of activation/deactivation ISR by context acknowledgement message.
Particularly, as first network entity will determine that by context response information result sends to second network entity.
Preferably, when area update procedures is specially the TAU process of initiating when the RA of UE from UTRAN enters the TA in E-UTRAN, SGSN will determine that result sends to MME; Or
When above-mentioned zone renewal process is specially the RAU process of initiating when the TA of UE from E-UTRAN enters the RA in UTRAN, MME will determine that result sends to SGSN.
Particularly, above-mentioned movement can reach timer by described first network entity maintaining, when described UE enters Idle state, start, at described UE, enter connected state and set up when NAS signaling is connected and stop with described first network entity, the overtime implicit expression attachment removal timer that starts; Implicit expression attachment removal timer is by described first network entity maintaining, when described UE enters connected state, set up when NAS signaling is connected and stop with described first network entity, overtimely trigger the detachment process that described first network entity is carried out described UE, and detachment process can be deleted the context of this UE safeguarding in first network entity.
The running status that can reach timer and implicit expression attachment removal timer according to the movement of the UE of its maintenance while receiving context request due to first network entity of the present invention determines whether to activate ISR, if rather than as existing procedure network node support activate ISR, indicate and activate ISR.Those skilled in the art can reach timer expiry according to movement and can trigger and adhere to timer, likely cause again returning when ISR activates at UE, and now there is no contextual problem, the running status that can reach timer and/or implicit expression attachment removal timer according to movement determines whether to activate ISR, avoids occurring the generation of the problems referred to above.
Provide the preferred embodiment of the present invention below.
In the invention process one, the activation/deactivation ISR optimization method providing, as shown in Figure 3, comprising:
Step S301, in the area update procedures of UE, first network entity receives the context request message that second network entity sends;
Step S302, whether first first network entity judges that the movement of the described UE of its maintenance can reach timer overtime, if not overtime, execution step S303, if overtime, execution step S304;
Step S303, first network entity is determined activation ISR;
Because movement can reach timer, do not have overtime, the implicit expression attachment removal timer of corresponding UE is also not activated, and according to existing standard, when if ISR activates, its when implicit expression attachment removal timer starts regularly length is greater than the length of deexcitation ISR timer of the first network of UE, so at UE when ISR state of activation is got back to the network at first network entity place again, on this first network entity, also preserve the context of this UE, there will not be the retrieval existing in prior art less than the contextual problem of UE.
Step S304, first network entity is determined deexcitation ISR.
Certainly, also can be by judging whether the implicit expression attachment removal timer of corresponding UE moves in the step S302 of this embodiment, if not in operation, execution step S303, if at operation execution step S304.
Due to movement, can to reach timer overtime, illustrates and started implicit expression attachment removal timer, and the startup of implicit expression attachment removal timer means the context that can delete after a while UE, therefore determines deexcitation ISR.UE is deexcitation ISR after receiving ISR deexcitation indication like this, when UE gets back to the network at first network entity place again, because network side and UE side all do not activate ISR, the sign that therefore there will not be network side to provide according to UE, in network, retrieval is less than the contextual situation of UE.
Here in the present invention who needs to illustrate, the deexcitation ISR of indication comprises two kinds of situations: during a kind of UE of being inactive I SR, keep not activating ISR, deexcitation ISR when UE has activated ISR during a kind of situation.
Below in conjunction with concrete application scenarios to embodiment of the present invention idiographic flow.
The RAU that the TA of application scenarios one: UE from E-UTRAN initiates while entering the RA in UTRAN, to be chosen in UTRAN resident for UE.
As shown in Figure 4, at UE, by E-UTRAN, access, be attached to EPS system, and UE is when reselecting community and being linked into UTRAN, the flow process that completes UE activation/deactivation in the present embodiment is:
Step S401, UE sends RAU request message to SGSN; Before sending message or after sending message, the periodicity TAU timer expiry of UE;
Step S402, SGSN receives the RAU request message that UE sends, and sends context request CONTEXT REQUEST message to MME;
Step S403, MME receives the context request CONTEXT REQUEST message that SGSN sends, and whether the movement that judges the UE of its maintenance can reach timer mobile reachable timer overtime;
If the movement of corresponding UE can reach timer mobile reachable timer, do not have overtimely, MME determine to activate ISR;
If the movement of corresponding UE can reach timer mobile reachable, timer is overtime, now, according to existing timer length legislations and flow process, implicit expression attachment removal timer Implicit Detach timer should also not have overtime, MME determines that implicit expression attachment removal timer is in operation, determines deexcitation ISR;
Step S404, whether the result after definite activation/deactivation ISR that SGSN reception MME sends by context response information, support to activate ISR in conjunction with this network node and determine that indication activates ISR or deexcitation ISR;
Step S405, SGSN sends to MME by the indication that activates ISR/ deexcitation ISR by context acknowledgement message;
Step S406, SGSN accepts RAU ACCEPT message by RAU the indication of activation/deactivation ISR is sent to UE, and correspondingly, UE is according to existing activation/deactivation ISR flow processing.
Owing to can reach timer expiry or implicit expression attachment removal in movement, regularly when moving, determining deexcitation ISR, is deexcitation at the ISR of UE side state.Like this at UE when ISR gets back to E-UTRAN again, only can use a temporary mark to initiate TAU.The ISR state of network side and the ISR state of UE side are deexcitation, and both are consistent.While avoiding occurring activating according to ISR because of UE, provide temporary mark to network, and network based this temporary mark can not find the contextual situation of UE.
The TAU that the RA of application scenarios two: UE from UTRAN initiates while entering the TA in E-UTRAN, to be chosen in E-UTRAN resident for UE.
At UE, by UTRAN, access, be attached to EPS system, and UE is when reselecting community and being linked into E-UTRAN, the flow process that completes UE activation/deactivation in the present embodiment is:
UE sends TAU request message to MME;
MME receives the TAU request message that UE sends, and sends context request CONTEXT REQUEST message to SGSN;
SGSN receives the context request CONTEXT REQUEST message that MME sends, and whether the movement that judges the UE of its maintenance can reach timer mobile reachable timer overtime;
If the movement of corresponding UE can reach timer mobile reachable timer, do not have overtimely, SGSN determine to activate ISR;
If the movement of corresponding UE can reach timer mobile reachable, timer is overtime, now, according to existing timer length legislations and flow process, implicit expression attachment removal timer Implicit Detach timer should also not have overtime, SGSN determines that implicit expression attachment removal timer is in operation, determines deexcitation ISR;
Whether the result after definite activation/deactivation ISR that MME reception SGSN sends by context response information, support to activate ISR in conjunction with this network node and determine that indication activates ISR or deexcitation ISR;
MME sends to SGSN by the indication that activates ISR/ deexcitation ISR by context acknowledgement message;
MME accepts TAU ACCEPT message by TAU the indication of activation/deactivation ISR is sent to UE, and correspondingly, UE is according to existing activation/deactivation ISR flow processing.
In the embodiment of the present invention, another kind of activation/deactivation ISR optimization method is provided, as shown in Figure 5, comprising:
Step S501, in the area update procedures of UE, first network entity receives the context request message that UE second network entity sends;
Step S502, whether first first network entity judges that the movement of corresponding described UE can reach timer overtime, if not overtime, execution step S503, if overtime, execution step S504;
Step S503, first network entity is determined activation ISR;
Because movement can reach timer, do not have overtime, so be also not activated implicit expression attachment removal timer, and according to existing standard, the length of implicit expression attachment removal timer is greater than the length of deexcitation ISR timer of the first network of UE, so at UE when ISR state of activation is got back to the network at first network entity place again, on this first network entity, also preserve the context of this UE, there will not be the retrieval existing in prior art less than the contextual problem of UE.
Step S504, first network entity is determined activation ISR, and will determine that the result that activates ISR sends to second network entity;
Step S505, second network entity receives after the result of above-mentioned activation ISR, if determine that this network node support activates ISR, determine that indication UE activates ISR, and the indication that activates ISR is accepted to message by area update send to UE, and send to first network entity by context acknowledgement message;
Wherein, when UE receives the indication of the activation ISR that second network sends, if the first network of this UE to periodically update timer overtime, UE starts or stops and restarts the deexcitation ISR timer of first network.
Stopping and restarting be described in the embodiment of the present invention restarted, and therefore restarts in embodiment and all refers to stop restarting below.
Step S506, first network entity receives after the indication of the activation ISR that second network entity returns, if the implicit expression attachment removal timer of corresponding UE moves,, with than the slightly long timing length of UE first network deexcitation ISR timing, restart the implicit expression attachment removal timer of corresponding described UE.
Certainly in step S502, also can regularly whether move whether activate determining of ISR according to implicit expression attachment removal.
The area update timer of above-mentioned first network safeguarded by described UE, at described UE, periodically starts during in Idle state, when described UE enters connected state, sets up when NAS signaling is connected and stops with first network, and overtime triggering UE initiated area upgrades;
The deexcitation ISR timer of described first network is safeguarded by described UE, when being state of activation, the area update timer expiry of described first network and ISR start, at described UE, enter connected state and set up when NAS signaling is connected and stop with first network, overtime triggering UE deexcitation ISR.
Preferably, first network entity is Mobility Management Entity MME, second network entity is service GPRS service node SGSN, the deexcitation ISR timer of the first network of described UE is E-UTRAN deexcitation ISR timer, and the periodical timer of first network is periodicity tracing section updating timer; Or
Described first network entity is SGSN, and second network entity is MME, and the deexcitation ISR timer of the first network of described UE is GERAN/UTRAN deexcitation ISR timer, and the periodical timer of first network is periodicity Routing Area Update timer.
Be that first network is corresponding with first network entity, second network is corresponding with second network entity.
Due to when determining that indication UE activates ISR, UE and first network entity start respectively deexcitation ISR timer and the implicit expression attachment removal timer of first network simultaneously, and when ISR activates, according to existing standard, the timing length of described implicit expression attachment removal timer is greater than the timing length of the deexcitation ISR timer of described first network, so when UE gets back to the network at first network entity place again, if it is overtime that the first network deexcitation ISR timer of UE does not have, first network entity is not also deleted the context of this UE.If the first network deexcitation ISR timer of UE is overtime, UE deexcitation ISR, even if network side does not now have deexcitation ISR, also there will not be any problem.
The embodiment of the present invention also provides the ISR method of operation of UE side, as shown in Figure 6, comprising:
Step S601, UE receives the indication of the activation ISR of network side transmission in the area update procedures of second network;
Step S602, UE determines that whether the area update timer of first network is overtime, as not overtime, execution step S603, if overtime, execution step S604;
Step S603, processes by existing procedure, receives and comprises that the area update that indication activates ISR information accepts after message, activation ISR.At area update procedures, complete and enter after IDLE state, start the area update periodical timer of second network, during at this area update timer expiry and in Idle state, start second network deexcitation ISR timer;
Step S604, UE starts or restarts the deexcitation ISR timer of the first network of described UE.
Preferably, the area update procedures of above-mentioned second network is Routing Area Update process, it is periodicity tracing section updating timer that the periodic regions of described first network is upgraded timer, and the deexcitation ISR timer of described first network is E-UTRAN deexcitation ISR timer; Or,
The area update procedures of above-mentioned second network is tracing section updating process, it is periodicity Routing Area Update timer that the periodic regions of described first network is upgraded timer, and the deexcitation ISR timer of described first network is GERAN/UTRAN deexcitation ISR timer.
Below in conjunction with concrete application scenarios to embodiment of the present invention idiographic flow.
The RAU that the TA of application scenarios one: UE from E-UTRAN initiates while entering the RA of UTRAN Shen, to be chosen in UTRAN resident for UE.
As shown in Figure 7, at UE, by E-UTRAN, access, be attached to EPS system, and UE is when reselecting community and being linked into UTRAN, the flow process that completes UE activation/deactivation in the present embodiment is:
Step S701, UE sends RAU request message to SGSN; Certain time before or after sending this message, the periodic regions of UE is upgraded timer-TAU timer expiry, and when overtime, UE does not also receive that RAU accepts message;
Step S702, SGSN receives the RAU request message that UE sends, and sends context request CONTEXT REQUEST message to MME;
MME receives the context request CONTEXT REQUEST message that SGSN sends, and whether the movement that judges the UE of its maintenance can reach timer mobile reachable timer overtime, and whether implicit expression attachment removal timer moves;
If the movement of corresponding UE can reach timer mobile reachable timer, do not have overtimely, MME determine to activate ISR, follow-uply by existing procedure, processes, and no longer describes in detail here;
If the movement of corresponding UE can reach timer mobile reachable, timer is overtime, and implicit expression attachment removal regularly moves, and determines and activates ISR, and flow process below all describes with this situation;
Step S703, SGSN receives the result of definite activation ISR that MME sends by context response information, SGSN when self whether supporting that activating ISR determines that indication UE activates ISR, execution step S704;
Step S704, SGSN sends to MME by context acknowledgement message by activation ISR indication;
Step S705, when MME receives by receiving this context acknowledgement message the indication that activates ISR, if the implicit expression attachment removal timer of corresponding UE moves,, with the slightly long timing of E-UTRAN DEACTIVATE ISR TIMER value than UE, restart the implicit expression attachment removal timer of corresponding UE;
Step S706, SGSN sends to UE by RAU ACCEPT by the indication that activates ISR;
Step S707, UE receives while comprising the RAU ACCEPT that activates ISR indication, determines that whether the periodicity tracing section updating timer of UE is overtime, if overtime, starts or restart the E-UTRAN deexcitation ISR timer of UE.
The TAU that the RA of application scenarios two: UE from UTRAN initiates while entering the TA in E-UTRAN, to be chosen in E-UTRAN resident for UE.
At UE, by UTRAN, access, be attached to EPS system, and UE is when reselecting community and being linked into E-UTRAN, the flow process that completes UE activation/deactivation in the present embodiment is:
UE sends TAU request message to MME, and before message sends or after sending, the periodic regions of UE is upgraded timing-RAU timer expiry, and when overtime, UE does not also receive that TAU accepts message;
MME receives the TAU request message that UE sends, and sends context request CONTEXT REQUEST message to SGSN;
SGSN receives the context request CONTEXT REQUEST message that MME sends, and whether the movement that judges the UE of its maintenance can reach timer mobile reachable timer overtime, and whether implicit expression attachment removal timer moves;
If the movement of corresponding UE can reach timer mobile reachable timer, do not have overtimely, SGSN determine to activate ISR, follow-uply by existing procedure, processes, and no longer describes in detail here;
If the movement of corresponding UE can reach timer mobile reachable, timer is overtime, and implicit expression attachment removal regularly moves, and determines and activates ISR, and flow process below all describes with this situation;
MME receives the result of definite activation ISR that SGSN sends by context response information, and whether MME is when self supporting that activating ISR determines that indication UE activates ISR, and MME is indicated activations ISR to send to SGSN by context acknowledgement message;
When SGSN receives by receiving this context acknowledgement message the indication that activates ISR, if the implicit expression attachment removal timer of corresponding UE moves,, with the slightly long timing of GERAN/UTRAN DEACTIVATE ISR TIMER value than UE, restart the implicit expression attachment removal timer of corresponding UE;
MME sends to UE by TAU ACCEPT by the indication that activates ISR;
UE receives while comprising the TAUACCEPT that activates ISR indication, determines that whether the periodicity Routing Area Update timer of UE is overtime, if overtime, starts or restart the GERAN/UTRAN deexcitation ISR timer of UE.
In embodiments of the invention three, the first network side apparatus that provides a kind of activation/deactivation ISR to optimize, as shown in Figure 8, comprising:
First activates determining unit 801, when receiving the context request message that UE sends by second network side apparatus when area update, according to the movement of the described UE of correspondence, can reach the running status of timer and/or implicit expression attachment removal timer, determine and activate or deexcitation ISR;
Transmitting element 802, for for determining that result sends to described second network side apparatus.
Preferably, described first activates determining unit 801 can reach timer expiry specifically for the movement specifically at the described UE of correspondence, determines deexcitation ISR, or when the implicit expression attachment removal timer of the described UE of correspondence is moving, determines deexcitation ISR.Or
Described first activates determining unit 801 can reach after timer expiry specifically for the movement at the described UE of correspondence, and the implicit expression attachment removal timer of corresponding described UE is when moving, and determines and activates ISR; Described first network side apparatus also comprises: restart attachment removal timer units 803, indication for the activation/deactivation ISR that returns according to described second network side apparatus, while being defined as activating the indication of ISR, when the implicit expression attachment removal timer of judgement corresponding UE is moving, restart the implicit expression attachment removal timer of corresponding described UE.
And described first activates determining unit 801 can reach timer when not overtime specifically for the movement at the described UE of correspondence, determines and activates ISR.
In this enforcement, implicit expression attachment removal timer described above is when restarting, and its timing length is greater than the timing length of deexcitation ISR timer of the first network of described UE.
Described first network side apparatus is Mobility Management Entity MME, and second network side apparatus is service GPRS service node SGSN, and the deexcitation ISR timer of the first network of described UE is E-UTRAN deexcitation ISR timer; Or
Described first network side apparatus is SGSN, and second network side apparatus is MME, and the deexcitation ISR timer of the first network of described UE is GERAN/UTRAN deexcitation ISR timer.
A kind of user terminal UE is also provided in the embodiment of the present invention, as shown in Figure 9, comprises:
Indication receiving element 901, receives the indication of the activation ISR of network side transmission for the area update procedures at second network;
Restart deexcitation ISR timer units 902, for when receiving the indication of described activation ISR, it is overtime that the periodic regions of determining the first network of this UE is upgraded timer, starts or restart the deexcitation ISR timer of the first network of described UE.
Preferably, the area update procedures of described second network is Routing Area Update process, it is periodicity tracing section updating timer that the periodic regions of described first network is upgraded timer, and the deexcitation ISR timer of described first network is E-UTRAN deexcitation ISR timer; Or,
The area update procedures of described second network is tracing section updating process, it is periodicity Routing Area Update timer that the periodic regions of described first network is upgraded timer, and the deexcitation ISR timer of described first network is GERAN/UTRAN deexcitation ISR timer.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.